堆积层滑坡垂直位移方向率的数值模拟研究  

Study on Numerical Simulation of the Directional Rate of Vertical Displacement in Landslide of Colluvial Layer

作　　者：张冰[1] 贺可强[1] 张娟[1] 徐鹏飞[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《山东科技大学学报（自然科学版）》2011年第6期48-54,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(40872184);三峡库区地质灾害教育部重点实验室开放基金项目(2008KDZ04)

摘　　要：以长江三峡库区巴东县境内的黄腊石滑坡工程实例为背景,运用大型有限元软件FLAC3D进行数值模拟,引入能反映滑坡位移方向改变的特征参数-滑坡垂直位移方向率作为滑坡稳定状态的评价参数,研究在边坡稳定演化过程中垂直位移方向率时空变化特征,发现了滑坡垂直位移方向率由稳定时的恒定值到失稳时的突然增大或减小的突变规律,得出边坡垂直位移方向率可以作为边坡稳定状态的预测判据。Based on the monitoring data of displacements resulted from the H uanglashi landslide, this paper completed a study on the change characters of time and space in directional rate of vertical displacement in the process of slope stability evolution by means of the large-scale finite element software F1AC3D and the eigen parameter-directional rate of vertical displacement which reflected the change of slope displacement direction was introduced as the parameter of evaluating the slope stability state. We found that the directional rate of vertical displacement had an anomal regulation from the constant value in stable stage to sudden increase or decrease of values in unstable stage. The conclusion is that the directional rate of the vertical displacement can be used for the criterion of predicting the slope stability.

关 键 词：边坡稳定性分析 堆积层边坡 垂直位移方向率 数值模拟 黄腊石滑坡 

分 类 号：P642.22[天文地球—工程地质学]